Question

Find the arithmetic mean of 4 and 18
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Answer 1

STEP 1:let the arithmetic mean be p, q, r hence 4,p, q, r, 18

STEP 2:U5=18=a+4d

a+4d=18

we're a=4 therefore

4+4d=18

STEP 3:4d/4=(18-4)÷4=14/4

d=14/4=3.5

p=U2=a+d=4+3.5=7.5

q=U3=a+2d=4+(2×7.5)

=

Answer 2

The arithmetic mean of two numbers is found by adding them together and dividing the sum by 2.

So, the arithmetic mean of 4 and 18 is:

(4 + 18) / 2 = 22 / 2 = 11

Therefore, the arithmetic mean of 4 and 18 is 11.

Explanation: